Induction-coil.



110,857,866. PATBNTED JUNE 25, 1907. M W. BRUJKMz-XNN.

INDUCT 1? 0 L= APPLIOATIOH FILED MAR. 14, 1905.

2 SHEETS-SHEET l.

No. 857,866. PATENTED JUNE 25, 1907. w. BRINKMANN. INDUCTION COIL.

APPLIOATION FILED HARM, 1905.

2 SHEETS-SHEET 2.

Inventor A ttys.

No. emcee;

1 tion, reference being bad to is a side elevation, partly broken away, sho'w- 4 which is s usual-manner about a soft iron core.

- claimed.

UNITED STATES PATENT- OFFICE.

MORRIS W. BRINKMANN, OF NEW YORK, N. Y.

' INDUCTION-COIL. I

Specification of Letters Patent.

Patented June 25, 1907.

' Application filed March 14,1905. Serial No; 249,978.

interrupter and is necessarily uniform in the. sense t will occur in a givenftime. The rate of vi- "brat-ion may be changed by varying the *mass,"tension, or material of the interruter,

at a given number of interruptions but when once these have been establis ed, the rate will immediately become uniform and the result-will be a series of currents of uniform intensity and frequency.

The object of m. invention is to provide means whereby a. p urality of secondary currents may be producedin the sameinduction coil, which currents shall be of varyin intensity and produced at varying periods of frequency together with suitable means for r regrulating and controlling the same.

he invention consists broadly in providaninduction coil with two or more interrupters and further consists in the new "and novel features of construction and combination of parts hereinafter set forth and Figure 1 is a plan view -6f an induction coil embodying my invention in" its preferred form. Fig. 2 is an end elevation showing one arrangement of the interrupters. Fig. 3

ing one form of mechanism, for adjusting the interrupters. In the a paratus enibodying my invention hown in the accompanyin drawings the secondary coil 0 is woun in the usual This is movable a screw 0 longitudinally of the-primary co'l d, which iswound in the erably the core is provided with a suitable head or enlargement f, so as to aff ord sufficient contact surface for theinterrupters Current is sup lied to the primary coil through the bin 'ng postslg and is controlled by a switch h.' t v I In the circuit are two or more contact points 1 and interrupters j, whichare conmanner u on a suitable bobbin 6..

Prefnected to the line circuit in parallel three of each being shown in the drawings. The contact olnts i may be adjusted by means of the t umb-screws '2' and may be formed of any suitable material and shape to determine the conductivity thereof and thus interpose desired resistance in the circuit. The interrupters may be constructed of such material or may be so formed as to provide resistance in t e circuit and comprise two or more strips of ribbons of any desired conducting material, but it is obvious that other forms of interrupters may be used. These ribbons are supported at one end by a suitable standard is and at their other ends which are movable in bearings provided by a standard Each holder is connected to one end of a lever m which is ivoted, as at n, to the standard 70 upon t e supporting are provided with suitable holders or clips Z frame. The free end of each lever is en-.

aged and actuated by a thumb-screw o. r'eferably said thumb-screws are micrometer screws, in order that the tension of the ribbons can be adjusted accuratel Suitable set-sc'rews p are rovided in tlie stand ard In for holding eac of the ribbons in its adjusted position.

The binding posts, being connected with a source of electrlcal energy, as a battery, and the connections being made, the current will flow through the rimary coil thus energizing the core, -whic will attract each of the ribbons, thus breaking the primary circuit, Since these ribbons are adjusted at different tensions and may be of different materials and mass, the ones having the highestvibratory rates will be the first to return closivriifi the primary circuit. The vibrations then continue at the ,vibratory rate of each interrupter as determined by its material,

inass and tension. The micrometer screws providethe means for regulating and adjusting the interrupters with relation to each ot er and to the strength of the current supplied through each contact point so that not only may the rate of vibratlon of each lnterrupter belgoverned, but the periods at which any two or mor; olf'the interrupters may make orbreak the circuit may be governed also, this securing reinforcement or cessation ofthe secondary current as desired;

By this construction, it is evident that the maximum effect, that is an induced lgaurrent having the greatest i ensity will e produced when all the Q 1 nterrupters coincide duced suddenly or gradually by a series of secondary currents which increase in 5 sinength until the nu linum is reached. It it; likewise evident that the minimum effect it produced when the primary circuit is .d or closed by the interrupter ""ia'test electrical resistance and that in "ct may also be produced suddenly or ,sgraduan The frequency of the respective periods inaximuii'i and minimum second-- ary currents is oi great importance in pro do 5 certain physiological effects particu- 15 lcrly upon muscles, tissues and nerves of the lnunan body. it is obvious also, that or: certain esul are produced by a given oi vibration of the interrruqters that cerph u-dc-l conditions or even physiologrl condi lo can be measured ainl deterl r s of such rate. 1 arious er objects are Within the scope invention and I do not intend to limit to the attainment only of the objects 'ioi'th, nor to the precise construcinc amid-rates shown, since various mes modifications, Within the skill "of ithe mecha'nic can be made in the a paratus, without departing from the spirit of my invention, provided the means set forth in the following claims be employed.

I claim as my invention:

1. An induction coil provided with two or more interrupters operating simultaneously to break the primary circuit.

iLn induction coil provided with two or more interrupters operating simultaneously to break the primary circuit and means for adjusting the tension of each of said interrupters.

3. An induction coil provided with two. or more interrupters operating. simultaneously to break the primary circuit, each inter rupter and corresponding contact point controlling a predetermined current strength.

This specification signed and witnessed this ninth day of March, A. D. 1905.

MORRIS W. BRINKMANN.

Signed in the presence of- ANTHONY N. JEsBERA, A. M. AUSTIN. 

